<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <el-table :data="rolelist" border stripe>
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1==0?'bdtop':'']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级权限 -->
                            <el-col :span="19">
                                <el-row :class="[i2==0?'':'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <el-tree :data="rightlist" :props="treeProps" :default-checked-keys="defKeys" show-checkbox node-key="id" default-expand-all ref="treeRef">

            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible=false">取消</el-button>
                <el-button type="primary" @click="allotRights">确定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
  created(){
      this.getRolesList()
  },
  data () {
    return {
        rolelist:[],
        setRightDialogVisible:false,
        rightlist:[],
        treeProps:{
            label:'authName',
            children:'children'
        },
        defKeys:[],//默认选中的节点id值数组
        roleId:''
    };
  },
    methods:{
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status != 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data 
        },
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除，是否继续?','提示',{
                confirmButtonText:'确定',
                cancelButtonText:'取消',
                type:'warning'
            }).catch(err=>console.log(err))
            if(confirmResult != 'confirm'){
                return this.$message.info('取消了删除')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status != 200){
                return this.$message.error('删除权限失败')
            }
            role.children = res.data
        },
        async showSetRightDialog(role){
            this.roleId = role.id 
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status != 200){
                return this.$message.error('获取权限数据失败')
            }
            this.rightlist = res.data
            // console.log(this.rightlist) 
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true 
        },
        //通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
        getLeafKeys(node,arr){
            //如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        setRightDialogClosed(){
            this.defKeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status != 200){
                //更新权限失败
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false 
        }
    }
}
</script>
<style lang='less' scoped>
   .el-tag{
       margin-top: 7px;
   } 
   .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee;
    }
</style>